Improved apparatus fob forming bumjer-oarriers for railroad cars



@einen gtst/es identit @ffice WILLIAM c. A'LLIso-N,- or PHILADELPHIA, PENNSYLVANIA.

Letters .Patent No. 65,987, dated June 25, 1867; antedated June 10, 1867.

IMPROVED APPARATUS FOB FORMING BUMPER-CARRIERS FOB. RAILROAD GARS, i

dlgs 'rlnhnli meint tu in ilgest Enters ntcnt arr-nuttig @tutti Ilge same.

TO ALL WHOM IT MAY CONCERN:

Be it known that I, WILLIAM C. ALLISON, of Philadelphia, Pennsylvania, have invented an Instrument forv Bending Metal Bars; and I do hereby declare the following to be a full, clear, and exact description of the same, reference being had to the accompanying drawing,and to the letters of reference marked thereon.

My invention consists of certain mechanism, fully described hereafter, for bending dat bars of iron to a forinsuitable for use as bumper-carriers and other parts of railroad'car-s.

In order to enable others skilled in the art to which this' most nearly appertaius to make and use my invention, I will now proceed to describe its construction and operation. On reference to the accompanying drawing, which. forms a part of this specication i I Figure l is a plan View of my instrument for bending bars, showing the straight bar in position ready to be bent. I A

Figure 2 is a plan view, showing two of the forming-blocks turned and the bar partially bent.

Figure 3, the saine, showing the bar bent to the desired shape.

' Figure is an invertedplan view of the instrument.

Figure 5, an edge view looking in the direction of the arrow, iig. 3.

Figure 6, a. section on the line 1-2, iig. `1. i

Figures 7 and 8, enlarged views of one of the forming-blocks.

Figure 9, a section on the line 3-4, iig'. 1.

Figures 10 and 11, enlarged views of parts of the instrument.

Similar letters refer to similar parts throughout the several view-s.

A is the bed-plate of the instrument, having on its under surface projections a a a, in which, and in the plate, turn various spindles mentioned hereafter. To the bed-plate is secured a block, B, adjacent to which is a block, C, a portion of the latter being overlapped by the block B, in the manner shown in figs. 5 and 6.' A spindle, D, passes up through the bed-plate A, and through the blocks C and B, and on this spindle is an eccenk tric, b, fitting into a recess in the block G, which can be moved from or towards the block B by turning the said spindle D, lateral motion of the block being prevented by the guide b. At equal distances from the .central spindle D are-four spindles, e, d, e, andf, which pass through and turn in the bed-platc, and through the projections d, and on the upper end of each of these spindles is a collar, bestobserved on reference to gs. 7 and 8, the collar being sunk sin the bed-plate The coller e of the spindle c forms apart of the block E, which rests upon the surface of the bed-plate, and which is furnished with a suitable handle, g. A similar block, E', forms a part of the collar d of the spindle d, and is provided with a similar handle, g. Secured to the collars e and f of the spindles e and f are two blocks, F and F', which are narrower than those above described, and'which have handles I and 7L. Turning in the bed-plate is a spindle, z, (fig. 9,) tothe lower end of which is keyed an arm,j, which is connected by a rod, 7c, to another arm, 7c', on the spindle D, an arrangement best observed. on reference to iig. 4. On the upper end ofthe spindle z' is an eccentric, l, having a. handle, Z', and bearing against n block, H, the latter having a strap, m, passing around theeccentric, and fitting into a groove on theedge of the same. The block H is adjacent to the blocks B and C, before described, and is arranged to slide towards or from the same on a guide, n, (fig. 9,) the desired motion being imparted by the eccentric l. In the bed-plate A are two holes, p and p, (fig. 2,) into which (when the parts are in the position shown in iig. 2,) it is necessary, for a purpose described hereafter, t0 insert two spindles, q and g', which, when inserted, are prevented from being withdrawn by a projection, r, of the bed-plate, the latter entering the groeven* of the spindle through a slot s cut in the same, (fig. 10.) On the upper end of the spindle g is an eccentric, t,'havinge handle, u, which eccentric rbears against the block E, and on the spindle q is a similar eccentric, t', provided with its handle Au".

, Operation.

The heated bar of iron' having been adjusted in the instrument to the position shown in iig. '.l, the eccentric Zis irst so turned as to press the said bar against the blocks B and C. inasmuch as the spindle ci' this cccen` tric is connected to the spindle D, the eccentric on the latter will 'move the block 'outwards from the block B, and these blocks are maintained in this position until the further operations of the instrument heverbeen completed. The blocks E and E are now turned to the position shown in fig. 2, thereby bending the bar at right angles at two points, and forcing the bent portions against the blocks B and C. The spindles of the eccentrics t and if are now inserted into the holes j) and p', and the 'eccentrics are so turned as to maintain the blocks E and E in the position shown in iig. 2, and at'the same time impart additional pressure tothe bnr. The partly-bent bar being now firmly held by the blocks E and E', B, C, and H, the blocks F and Fvare turned to the position shown in iig. 3, thereby completing the bending of the bar to the desired form, the removal of the bar from the instrument being readily effected after iirst operating'the handle Z, and lthereby drawing back the block H and moving inwards the block C simultaneously, then withdrawing the eccentrics tt, and finally removing the blocks E and E and F and F to their original positions. The centre on which each of the several blocks E and E and F and F' turns, nearlr coincides with that corner of the block by which the bending of the bar is accomplished; hence the bend will be abrupt and perfect.v But for the intervention ofthe collar between eaehblock and its spindle, this coincidence of thecentre of the latterwith the said corner could not be arranged Without .making the point ofjunction between the bloei( and its spindle too weak, a weakness which is obviated by the collar, the latter presenting no obstruction to the proper workingroil the instrument, as the collar of each block is let into the base-plate. K

l claim as my invention, and desire to secure bj' Letters Patent-- 1. The combination of the block H, handled eccentric l, blocks B and C, and the devices herein described, er the equivalents to the same, for effecting the 'simultaneous action of the blocks in the manner described.

2. The combination, substantially as described, of the bending-blocks E and E and F and F', with the blocks B and C.

The combination of the forming-blocks E and E with the handled eecentrics i t.

4. The arrangement, on' each of theseveral forming-bloeks, of its spindle and collar, in respect tothe corner of the block, as described.

In testimony whereof I have signed my name to this specication in the presence of twol subscribing witnesses. I

WlLLIAM C. ALLISON, Witnesses:

C. B. PRICE, JOHN WHITE.

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